While hopes are rising that a rapid rollout of Covid-19 vaccines is helping to tame the pandemic in the U.S., in much of the world the virus is still surging.
Covid-19 case rates across the globe are at their highest levels since the start of the pandemic, illustrating the continuing race between vaccinations and the virus and the stiff challenge presented by new variants that are emerging and spreading quickly around the world.
As of Wednesday, nearly 5.6 million new confirmed cases were reported over the previous week, more than double the level of mid-February, and higher than the previous …
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